I think we have a 260 chracter length restriction problem

ok, what i did, it seems to work and it may or may not help someone else.  I have no idea if it is right or wrong, I am still not convinced this script / alarm point is implemented in the smartest or most efficient way, but I am very new to LogicMonitor and it needs to work today ?  ( and yes, I will be getting me some proper LM training!)

The general process is this, a ps script runs on the Biztalkhost and generates a list of sendports. :-

Then we have an embedded PS active discovery script which looks like this   ( the commented out sections I will come too later! )

$hostname = "##system.sysname##.##system.domain##"
$csvFilePath = "\\192.168.123.195\BizTalk_Monitoring$\" + $hostname + "_sendPorts.csv"
#$regex= "RB\.RIP\.|Orchestrations\.|_e6dd5c64fddc35ff|_\d\.\d\.\d\.\d"

# Get BizTalk Send Port Information

if(Test-Path -Path $csvFilePath){
    $sendPorts = Import-Csv -Path $csvFilePath
}

foreach ($sendport in $sendPorts){
   $name  = $sendport.Name
#   $alias = $sendport.Name
#if (($sendport.Name.length) -gt 130 ) {
#    $alias = $sendport.Name -replace $regex
#}
write-host "$name##$name" 
#write-host "$name##$alias"
#write-host "$alias##$name"
}

this produces a nice long list of datapoints in LM ( fig1.png)

Then we run a collector script :-

$hostname = "##system.sysname##.##system.domain##"
$fileDateLimit = (get-date).addMinutes(-15)

$csvFilePath = "\\192.168.123.195\BizTalk_Monitoring$\" + $hostname + "_sendPorts.csv"
if(Test-Path -Path $csvFilePath){
    $fileDate = (get-item -Path $csvFilePath).lastwritetime
    [ARRAY]$sendPorts = Import-Csv -Path $csvFilePath

    if ($fileDate -gt $fileDateLimit){
        foreach ($sendPort in $sendPorts){
            #$Location = $recLocs | where-object {$_.Name -eq "##WILDVALUE##"}
            $status = $sendPort.Status
            $name = $sendPort.Name
            $stopped = $false
            
            # Check if manually stopped =  No alert
            if ($name -like "_STOP*"){
                $stopped = $true
                write-host $name".Status=2"
            }
            
            if (($status -eq 2 -or $status -eq 1) -and -not $stopped){
                write-host $name".Status=1"
            }
            elseif (($status -ne 2 -or $status -ne 1) -and -not $stopped) {
                write-host $name".Status=0"
            }
        }
    }
    elseif ($fileDate -lt $fileDateLimit){
        write-host $name".Status=100"
    }
}

and if we have a nice long name... the script fails.

So I slapped in a little regex to remove some duplicate data in the names :-

$regex= "RB\.RIP\.|Orchestrations\.|_e6dd5c64fddc35ff|_\d\.\d\.\d\.\d"

foreach ($sendport in $sendPorts){
  $name  = $sendport.Name
  $alias = $sendport.Name
if (($sendport.Name.length) -gt 130 ) {
    $alias = $sendport.Name -replace $regex
}
#write-host "$name##$name"

#This seems to be the incantation that works.

write-host "$name##$alias"

}

So I am guessing it is that second parameter "$alias" that provides the name of the script that LM runs in the collector phase. 

Thanks to everyone for pointers and tips. most helpful.